https://lynceans.org/all-posts/compact-mobile-3d-scanning-systems-that-can-render-a-complete-editable-3d-model-in-minutes/

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Compact, Mobile 3D Scanning Systems that can Render a Complete,
Editable 3D Model in Minutes

December 16, 2015All Posts, Computer TechnologyCubify, iSense, mobile
3d scanning, Occipital Lab, Structure SensorDrummer

Peter Lobner

The Cubify (cubify.com) iSense 3D scanner is a high-resolution, infra
red depth sensor that clips onto an iPad, uses the iPad camera,
accelerometer and gyroscopes to understand its orientation relative
to the subject, and with the all-important 3D scanning application
running on the iPad, creates a scale 3D model of the subject.

iSenseSource: Cubify

I first saw the iSense 3D scanner demonstrated in July 2015 at
Comic-Con San Diego. With the scanner attached to the back of an
iPad, the person conducting the demonstration selected a subject to
be scanned and then walked around that person at a distance of about
three feet while monitoring the real-time scan progress on the iPad
screen. In about 90 seconds the scan around the subject was complete
and it took about another 90 seconds for the software to render the
3D model (a "point cloud") of the subject's head. Since this was a
quick demonstration, there were a couple of small voids in the 3D
model (i.e., under the chin and nose where the scanner didn't "see"),
but otherwise, the resulting model was an accurate scale
representation of the subject. What was even more remarkable was that
this process was done using the computing power of a
current-generation iPad. The resulting color 3D model could be
processed further (i.e., to create a mesh model) or sent for printing
to a local 3D printer or a printing service accessed via the
internet. A version of iSense for the iPhone also is available.

You can read the technical specifications for iSense at the following
link:

http://cubify.com/products/isense

A similar scanner with greater capabilities is the Structure Sensor
from Occipital Labs. The Structure Sensor operates over greater
distances than the iSense and appears to be intended to support a
greater range applications, including the following:

  * Capture dense 3D models of objects
      + When used as a 3D scanner, Structure Sensor allows you to
        capture dense geometry in real-time and create high-fidelity
        3D models with high-resolution textures.
      + The resulting model can be sent to a printer for
        manufacturing, or used in connection with a simulation tool
        to model the real world physics behavior of the object.
      + The Structure Sensor uses the iPad's color camera to add
        high-quality color textures to the 3D model captured.
  * Measure entire rooms all at once.
      + 3D depth sensing enables the rapid capture of accurate,
        dimensions of objects and environments.
      + Structure Sensor captures everything in view, all at once.
      + Software simplifies large-scale reconstruction tasks
  * Unlock the power of real-time occlusion and physics
      + Once objects or whole environments have been captured by
        Structure Sensor, the resulting model constitutes a virtual
        environment with specified physical properties. Other virtual
        objects can interact with this model based on the assigned
        physical properties (i.e., bounce off surfaces, move under
        tables or behind structures, etc.)
      + Virtual environments can be rapidly developed and integrated
        seamlessly with games or simulations

You can find more information on the Structure Sensor at the
following link:

http://structure.io

If you are curious about this type of scanning technology, there are
several demonstrations available on YouTube. If you are willing to
spend 21 minutes to watch a detailed test of the Structure Sensor, I
recommend the 9 December 2014, "Tested In-Depth: Structure Sensor 3D
Scanner," by Will and Norm, which you can view at the following link:

https://www.youtube.com/watch?v=mnOzzbl0Uqw

Here are a few screen shots from Will & Norm's scanning
demonstration. During the scan, the white areas represent areas that
have been successfully scanned.

Structure Sensor scan 1

The complete point cloud model is shown below. This model can be
rotated and viewed from any angle.

Structure Sensor scan 2

The rendered model, with colors and textures captured by the iPad's
camera, is shown below.

Structure Sensor scan 3

So, at Uncle Joe's 90^th birthday party, get out your iPad with an
iSense or Structure Sensor, capture Uncle Joe in 3D, and print a bust
of Uncle Joe to commemorate the occasion. If you're more ambitious,
you can capture the whole room with a Structure Sensor and build a
game or simulation into this virtual environment.

Recent reviews posted online indicate that this type of 3D scanning
is not yet mature and it may be difficult to get repeatable good
results. Nonetheless, it will be interesting to see the creative
applications of this scanning technology that emerge in the future.

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